pyrochroite

pyrochroite

[‚pī·rə′krō‚īt]
(mineralogy)
Mn(OH)2 A hexagonal mineral composed of naturally occurring manganese hydroxide; it is white when fresh, but darkens upon exposure.
Mentioned in ?
References in periodicals archive ?
345 Calcite and pyrochroite, Franklin, New Jersey, no.
Other Mn-bearing silicates, mainly pyrochroite and a reddish brown manganoan phlogopite, are ubiquitous in smaller amounts.